1993 年 34 巻 11 号 p. 1155-1160
The tritium surface reaction in lithium ceramics is investigated by combining in-situ tritium release experiments under neutron irradiation, out-of-pile experiments such as desorption studies, and modeling efforts. It was found that tritium is released from lithium ceramics in the chemical form of HT or HTO depending on the chemical composition of the sweep gas. The surface nature or existing state of surface hydroxyl group is important and was found to be affected by the sweep gas and sample pretreatment. The nature of the surface hydroxyl group also plays an important role in modeling the tritium release. In-situ observation of the surface hydroxyl group by infrared absorption spectroscopy revealed that the surface is heterogeneous for D2O adsorption.
